We traveled with our pets a lot when I was younger, Taiwan, Japan, the Philippines. There did not used to be any quarantine in the US, but were in other countries. Check with the airlines, you will probably just need a current health certificate and crates the airline approves of. If they are not on the same plane as you someone needs to meet them at the other end. Some people will get from their vet a mild tranquilizer to keep them calm. We did the first time with our cocker spaniel and were happy she seemed fine and later found the pill lying in the bottom of her crate, so never bothered after that. We have flown dogs and a cat and never had any problems. Good Luck